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Finding the Fourth Proportional to 104,275.80, 143,920.53 and 61,857.72

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Solution

The fourth proportional to 104,275.80, 143,920.53 and 61,857.72 is: 85,375.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,275.80 : 143,920.53 = 61,857.72 : x
  2. Step 2: Convert to fraction form
    104,275.80/143,920.53 = 61,857.72/x
  3. Step 3: Cross multiply
    104,275.80x = 143,920.53 × 61,857.72
  4. Step 4: Simplify right side
    104,275.80x = 8,902,595,846.99
  5. Step 5: Solve for x
    x = 8,902,595,846.99/104,275.80
  6. Step 6: Final answer
    x = 85,375.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.